<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <!-- <img v-bind:src="imgSrc" alt="">
    <button v-bind:aaa="a">按钮</button> -->
    <img :src="imgSrc" alt="">
    <button :aaa="a">按钮</button:aaa=>
  </div>
  <script src="./vue.js"></script>
  <script>
    const vm = new Vue({
      el: '#app',
      data: {
        imgSrc: 'http://www.cgtpw.com/d/file/202009/uegzqm1es4f.jpg',
        a: '这是自定义属性'
      }
    })
  </script>
</body>
</html>